Ubuntu users can continue to use the: develop PPA but I am hoping to have a snap package soon.

Deluge 2.0 has been many years in development, the sheer amount of code needing fixed and updated along with catching up with libtorrent changes has made it a long road. As almost the sole developer at this stage it will be no easy task but in the next few months I do hope to get it released.

This is a great news!Just a question: right now it's possible to choose the priority of every single file inside the torrent, but not the torrent itself.It will be possible to choose the priority of the torrent directly so I will have torrent priority -> torrent file priority?

Yeah I do understand. The following is from the libtorrent dev on mailing list:

arvid wrote:It's utility and implementation was questionable, it did not have a welldefined behavior nor any tests. All it did (iirc) was to scale the~bandwidth quota assigned to peers based on the priority of the torrent theybelonged to. Keeping it seemed to cause more harm than benefit, since itmade the code more complex.